Moat is described as 'Real-time, multi-platform, and actionable marketing analytics'. There are four alternatives to Moat for Online / Web-based, iPhone and iPad. The best alternative is ComScore Media Metrix, which is free. Other great apps like Moat are AdClarity (Paid), Nielsen (Free) and Clootrack (Paid).
AdClarity is the leading Competitive Intelligence SaaS Solution for Digital Media. With AdClarity you can see which campaigns, creatives and traffic sources (i.e. websites that sell ad inventory) are working best for your competitors, and where they're not cost-effective.